Đáp án:Giải thích các bước giải:

$\text{a) 3m 4cm = 3,04m = 30,4dm}$

$\text{4km 5m = 4,005km = 40050dm}$

$\text{2,6m = 0,26dm =26dm}$

$\text{215m 7cm = 2150,7dm = 21507cm}$

$\text{b) 4m² 52cm²= 4,52dm² = 4052cm²}$

$\text{2m² 4dm² = 2,4m² = 240cm²}$

$\text{3m² 425cm² = 3,0425m² = 30,425dm²}$

$\text{3m² 425cm² = 3,0425m² = 30,425dm²}$

$\text{41/2m²= 9/2m² = 900/200dm²}$

$\text{c) 3m3 7dm3 =3,7m3 = 3007dm3}$

$\text{4,6dm3 =0,46m3 = 460cm3}$

$\text{31/4m3 =13/4m3 =13000/4000dm3}$

$\text{7,6dm3 =0,76m3 =76cm3}$

A) 3m 4cm = 3,04m = 30,4dm

     4km 5m = 4,005km = 40050dm

    2,6m = 0,26dm =26dm

    215m 7cm = 2150,7dm = 21507cm

B) 4m2 52cm2 = 4,52dm2 = 4052cm2

    2m2 4dm2 = 2,4m2 = 240cm2

    3m2 425cm2 = 3,0425m2 = 30,425dm2

    41/2m2 = 9/2m2 = 900/200dm2

C) 3m3 7dm3 =3,7m3 = 3007dm3

    4,6dm3 =0,46m3 = 460cm3

    31/4m3 =13/4m3 =13000/4000dm3

    7,6dm3 =0,76m3 =76cm3